I got a spam this morning, laden with a virus, which uses an email address which looked something similar to one of those you used to use, the headers are below, please notify your admin to fix this unfortunate problem.

Looks like we are both in someone's address book who got infected with a virus. It is typical for the recent virusses. I get at least 50 of these things per day.
The originating address (as far I could trace it) and operating system do not match with the systems we are using.